@fgbjr Says this on their website:

Another name for the seven stars 『the Big Dipper』 has been considered in China since ancient times to be the gods of heaven who control the lifespan of humans. We also named it Iwata Nanatsuboshi 『Iwata Nanatsuboshi』 in the hope that it will become one of the seven stars of the Big Dipper, which derives the North Star, the basic celestial body, and lead Iwata City and its neighbors to a healthy daily life 『and the most important health』. We also offer you 『healing and relaxation』 to spend every day 『healthy, energetic, smiling』 with seven stars, which is not a three-star or five-star rating.